Double twist spindle



K. NIMTZ DOUBLE: TWIST SPINDLE Dec. 10,1968

5 Sheets-Sheet 1 Filed June 5, 1967 IIIIIIDI Fig. I

I ,ventor: M

Dec. 1o, 1968 K. NIMTZv DOUBLE TWIST SP INDLE 5 Sheets-Sheet 2 Filed June 5, 1967 K. NIMTZ DOUBLE TWIST SPINDLE Dec. 10, 1968 3,415,049

Filed June 5, 1967 5 Sheets-Sheet 'lnvgntbr:

Dec. 10, 1968 K. NIMTZ DOUBLE TWIST SPINDLE 5 Sheets-Sheet 4 Filed June 5, 1967 Dec. 10, 1-968 K, MMTZ v 3,415,049

DOUBLE TWIST SEINDLE Filed June 5. 1967 5 Sheets-Sheet E) F lg. 9

In ven tor:

United States Patent 3,415,049 DOUBLE TWIST SPINDLE Klaus Nimtz, Krefeld, Germany, assignor to Palitex Project-Company G.m.b.H., Krefeld, Germany Filed June 5, 1967, Ser. No. 643,643 Claims priority, application Germany, June 6, 1966, P 39 624 13 Claims. Ci. s7-ss.49)

ABSTRACT OF THE DISCLOSURE The invention relates to a double twist spindle in which the two threads that are to be twisted together are drawn oif overhead from two draw-oil bobbins inside a stationary bobbin carrier. This well known arrangement has the drawback that the bobbins must be inserted one by one, an operation which is inconvenient and wasteful of time.

It is the object of the present invention to facilitate the insertion of the bobbins and to make provision for assembling the bobbins carrying the threads that are to be twisted together outside the machine before they are inserted. It is intended that the machine minder should have to handle only bobbin units comprising the assembled bobbins thereby to reduce the number of manipulations on the machine itself to a minimum.

According to the invention this is achieved by mounting the core tubes of the bobbins on a loose hollow cylindrical holder which can be readily inserted into the bobbin carrier and just as easily dotfed. The bobbins and the holder thus form a unit. The tubular cores rest on a collar on the holder or a ball type catch may be provided which engages a recess in the tubular core. A knobshaped configuration of the upper end of the supporting member facilitates handling the same.

Operation of the machine is considerably facilitated by the use of this loose holder for the bobbins because fewer manipulations are needed at the machine. The holder also permits the running of the machine to be better and more reliably supervised and it is easily possible to make the existing adjustment of the yarn brake visible on the outside of the holder.

When the holder with the bobbins is being exchanged, the yarn brake inside the spindle is accessible and can be readjusted according to requirements.

In order to permit the selected brake adjustment to be checked from the outside when the holder has been reinserted, the invention further proposes to provide at the upper end of the holder a marking, preferably in the form of a numbered scale. An insert member with an inclinedface associated with said markings is introduced into the holder. This inclined face rests on a corresponding face on the brake housing or an associated head which must be rotated for adjusting the braking force. The angular position of the holder in the spindle and hence the position of the externally visible markings is thus determined by the existing adjustment of the brake. Without stopping the machine every spindle in the machine thus clearly shows whether the desired conditions Patented Dec. 10, 1968 "ice with reference to the braking of the thread are actually provided.

In cases in which it is desired that the yarn brake should be adjustable when the bobbins are inside the spindle, the arrangement may with advantage be such that the insert member provided with the inclined face fitted into the bottom end of the holder rests on a 00- operating member provided with a correspondingly inclined face and affixed to the hub of the protective pot, whereas the yarn brake is located at the upper end of the holder in such manner that at least the markings project from the holder, the brake housing being provided with a tappet for engagement of a slot in the holder. The insert member fitted into the bottom end of the holder serves for locating the holder in the spindle by the cooperating of the two inclined faces. This also establishes the position of the slot which is engaged by the tappet on the brake housing, so that the relative angle of rotation of the two parts of the brake housing will be indicated. This arrangement renders the yarn brake accessible and adjustable from the outside at any time, the markings projecting from the top of the holder where they are visible.

Preferred embodiments of the invention are illustratively shown in the drawings each of which is a vertical axial section of a spindle.

FIG. 1 and FIG. 2 are two embodiments of the invention,

FIG. 3 and FIG. 4 illustrate a form of construction of the upper end of the holder,

FIG. 5 is another embodiment FIG. 6 is yet another embodiment,

FIG. 7 is the upper end of the holder in FIG. 6, partly in section,

FIG. 8 is a view of the brake housing,

FIG. 9 is a modified form of construction and FIG. 10 is a vertical section of the upper end of the holder in FIG. 9 after removal of the brake.

The proposed double twist spindle comprises a stationary bobbin carrier 1 which in the illustrated example is adapted to receive two draw-off bobbins 2 and 3 for overhead draw-oif of the yarn that is to be twisted together. According to the invention there is provided a hollow cylindrical holder 4 which can be loosely inserted into the bobbin carrier 1, and readily doffed. The tubular cores 5 and 6 of the two bobbins 2 and 3 are mounted on this holder 4. The bottom tubular core 5 rests on a collar 7 of the holder. The two cores 5 and 6 and the bobbins 2 and 3 together with the holder 4 form a unit assembly which can be prepared outside the machine and then mounted on the spindle with a minimum of manipulations.

At its upper end the holder, as indicated at 8, has a knob-shaped configuration to facilitate handling. As shown in FIG. 3 the knob-shaped portion 8 which has a peripheral concavity may be covered with a flexible clip-on cap 9.

In the embodiment illustrated in FIG. 1 the tubular cores 5 and 6 can be slipped over the holder 4 from above. Alternatively, it may be preferred to make the holder insertable into the tubular cores from above. This will then permit the several cores and bobbins to be directly picked up with the holder from a table or some other surface with an absolute minimum of handling. In order to enable this to be done the embodiment illustrated in FIG. 2 includes a ball catch 11 inside the holder, so arranged that the balls can engage a recess 12 in the interior of the lower of the two tubular cores 13. The ball catch is operable by a sliding sleeve 14 with a coned end 15. Above the knob-shaped portion 8 of the holder 10 the sliding sleeve 14 is formed with a head 16 which 3 also carries the yarn entry tube 17. This holder 10 permits the tubular core 13 and its bobbin 19 and then the tubular core 18 and its bobbin 20 to be picked up without the bobbins having to be touched by hand. By suitably actuating the sliding sleeve 14 the two cores can just as easily be released and deposited on a table.

In order to eliminate the need of providing each holder with a yarn entry tube, as would be the case in the embodiments according to FIGS. 1, 2 and 3, the yarn entry tube 17 may be fitted with a coned base 21 (FIG. 4) so that it can be taken out of a socket. The entry tube can then be continuously used for one and the same Spindle.

An alternative is illustrated in FIG. where the entry tube 17 forms part of the spindle 24 as is conventional. In this arrangement the holder 4 has an appropriate passage 25 for threading it onto the entry tube 17.

The yarn ends may be looped around the knob and thus temporarily fixed. Alternatively, the upper end of the holder 4 or may be provided, for instance at t e yarn entry tube 17, with means for the temporary fixation of the yarn ends 22 whilst the machine minder picks out the corresponding yarn ends in the machine, These means may have the form of an elastic clamping ring 23 (FIG. 1). Instead, the knob 8 could be provided with notches.

In the embodiment according to FIG. 6 two draw-off bobbins 2 and 3 on a hollow cylindrical holder 4 are inserted into a double twist spindle provided with a stationary bobbin carrier 1. The tubular cores 5 and 6 rest on a collar 7.

The upper end 8 of the holder may likewise be formed with a peripheral concavity to serve as a grip has an extension 1'28 which bears markings 129, in the illustrated embodiment in the form of a numbered scale.

Firmly fitted inside the holder is an insert member 130 internally formed with an inclined face 131 (FIG. 7) which is associated with the markings. This inclined face 131 rests on a cooperating inclined face 132 on a head 133 surmounting the brake housing 134. The inclined face 132 might also be formed directly on the brake housing 134. For adjusting the brake to a given brake effect the housing 134 or the head 133 must be rotated. The peripheral position of the inclined face 132 is thus changed and this change is transmitted through the cooperating inclined face 131 to change the position of the markings 129 which can be seen from the outside, whereas the position of the brake and its numbered markings 135 cannot be seen from the outside. An important feature is that the external markings 129 indicating the brake adjustment automatically set themselves without requiring any manual assistance by the machine minder.

In order to avoid increasing the overall height of the spindle by the provision of the extension 128, it is preferred to keep the yarn entry tube 17 very short and to provide a fixed ring 136 over which the yarn can ride. The height of the developing balloon is thus reduced and the yarn tension is kept desirably low.

In the embodiment according to FIG. 9 which permits the brake to be adjusted after the bobbins have been inserted, the stationary bobbin carrier 1 likewise carries two draw-oil bobbins 2 and 3 which are inserted after having been mounted on the hollow cylindrical holder. The tubular core 5 rests on a collar 7, whereas the core 6 is supported by the core 5.

An insertion 240 with an inclined face 241 is firmly fitted into the bottom end of the holder 4. This inclined face 241 sits on a corresponding inclined face 242 of a supporting member 243 firmly secured to the bobbin carrier 1.

The position of the insertion 240 and hence of the holder are thus always fixed.

The yarn brake in its housing 234 is located in the upper end of the holder 4. The upper end of the yarn brake and hence the markings 235 project from the holder 4. The housing 234 is formed with a tappet 234a which engages a slot 244 in the holder 4 (FIG. 10). When the brake is readjusted, i.e., when the brake is set to a desired braking effect, the position of the tappet changes in relation to the markings (scale) 235 and after the brake has been reinserted into the spindle the 'reengagement of the tappet by the slot 244 causes a particular number on the scale to face the machine minder. The braking effort is adjusted by relatively turning the two parts of the divided housing 234, thereby causing for instance a spring biased braking cartridge to be pressed with a corresponding thrust against a brake ring. The yarn runs between the cartridge and the ring and is thus braked according to the selected adjustment. However, the construction of a preferred yarn brake which could also be used in the embodiment according to FIG. 6 forms no part of the present invention.

Typical yarn brakes suitable for use herein are shown in US. Patent 3,352,510.

For mounting the brake housing 234 the insertion 240 is provided with a tubular extension 245 formed with a cup-shaped socket 246. The tubular extension 245 guides the yarn which runs downwards through the entry tube 17 and the yarn brake 234.

As will be understood the yarn brake 234 as well as the markings 235 are always accessible and visible from the outside and the bobbins 2 and 3 need not be doffed for taking a reading.

In the illustrated examples the tubular cores are cylindrical. However, coned core tubes could also be used. In such a case an appropriately shaped intermediate member must be provided and/or the collar must be formed with an appropriate extension.

What is claimed is:

1. A double twist spindle for twisting together a plurality of yarns withdrawn overhead, said spindle comprising, in combination: at least two separate draw-off bobbin elements, each comprising a bobbin and a tubular core for the bobbin; a stationary bobbin carrier; a hollow cylindrical holder detachably mounted on said carrier; support means on said holder exteriorly thereof for supporting said draw-off bobbin elements; said draw-off bobbin elements being received upon said holder with said holder entering said tubular core of each; one of said draw-off bobbin elements being arranged above and stacked upon another of said draw-off bobbin elements, said other of said draw-elf bobbin elements being seated upon said support means, whereby said hollow cylindrical holder and said draw-off bobbin elements thereon may be inserted into and dolfed from said stationary bobbin carrier as a unit.

2. A double twist spindle according to claim 1 wherein said support means comprises means defining a circumferential collar on said holder; the tubular core of the other of said draw-off bobbins being seated upon said collar.

3. A double twist spindle according to claim 2 wherein the lower end of each tubular core, but that of said other draw-oft" bobbin element, is supported upon the upper end of the tubular core of the respectively next lower of said draw-off bobbin elements to stack said draw-off bobbin elements.

4. A double twist spindle according to claim 1, in which the holder is fitted with a ball catch and a sliding sleeve having a coned end co-operating with the catch for engagement of said catch with a recess in the tubular bobbin core.

5. A double twist spindle according to claim 1 in which the upper end of the holder has a knob-shaped configuration with a circumferential concavity.

6. A double twist spindle according to claim 5, comprising an elastic clip-on cap for covering said upper end of the holder.

7. A double twist spindle according to claim 1 comprising a yarn entry tube fitted with a coned base and in which said holder is provided with a socket to receive said coned base so that the said tube can be readily engaged with or disengaged from the holder.

8. A double twist spindle according to claim 1, comprising a yarn entry tube forming part of the spindle, said holder being provided with a passage for enabling the holder to be threaded over the said entry tube.

9. A double twist spindle according to claim 1, in which the upper end of the holder is provided with means co-operating therewith for temporarily fixing the ends of the yarns from the bobbins.

10. A double twist spindle according to claim 9, in which said means are in the form of an elastic clamping ring.

11. A double twsit spindle according to claim 1, comprising a yarn brake contained in a housing, the upper end of the holder being provided with markings and an insert member which is fitted into the holder and is formed with an inclined face associated with said markings and wherein the yarn brake housing or a head member thereof which is rotatable for adjusting the brake is provided with a corresponding inclined face with which the firstrrrentioned inclined face co-operates.

12. A double twist spindle according to claim 11, in which the insert member is fitted into the bottom end of the holder and provided with an inclined face :and the bobbin carrier is provided with a hub provided with a corresponding inclined face upon which the said firstmentioned inclined face rests, the yarn brake being located at the upper end of the holder in such manner that at least markings associated therewith project from the holder, the brake housing being provided with a tappet for engagement of a slot in the holder.

13. A double twist spindle according to claim 11 in which the holder has an extension which bears the said markings and comprising a ring fitted to said extension over which the yarn can ride.

References Cited UNITED STATES PATENTS 1,995,533 3/1935 Bochmann et al 5758.52 2,379,806 7/1945 Kent 5758.83 XR 2,442,775 6/1948 Nelson 57-58.52 XR 2,445,721 7/1948 Bartholomew 57-58.86 XR. 2,478,927 8/1949 Carter 5758.86 2,718,363 9/1955 Roberts 575852 XR 2,785,526 3/1957 Keith 5758.83 XR 2,932,152 4/1960 Jackson 5758.83 XR 3,044,246 7/1962 Schippers 575852 3,119,224 1/1964 Kocks 5758.52 2,442,775 6/1948 Nelson 575852 XR 3,022,623 2/1962 Lenk 5758.83 3,295,306 1/1967 Rehn 5758.83

FOREIGN PATENTS 573,276 4/1932 Germany. 594,542 11/ 1932 Germany.

FRANK J. COHEN, Primary Examiner.

D. E. WATKINS, Assistant Examiner.

US. Cl. X.R. 5 75 8.83 

